﻿var jqueryslidemenu = {
    animateduration: { over: 200, out: 100 },
    buildmenu: function (menuid) {
        jQuery(document).ready(function ($) {
            var $mainmenu = $("#" + menuid + ">ul");
            var $headers = $mainmenu.find("ul").parent();
            $headers.each(function (i, item) {
                var $curobj = $(this);
                var $subul = $(this).find('ul:eq(0)');
                this._dimensions = { w: this.offsetWidth, h: this.offsetHeight, subulw: $subul.outerWidth(), subulh: $subul.outerHeight() };
                if ($.browser.msie)//ie z-index bug
                    $(item).children('ul').append('<iframe style="width:' + (this._dimensions.subulw + 1) + 'px;height:' + this._dimensions.subulh + 'px;"></iframe>');
                this.istopheader = $curobj.parents("ul").length == 1 ? true : false;
                $subul.css({ top: this.istopheader ? this._dimensions.h + "px" : 0 });
                $curobj.children("a:eq(0)").addClass(this.istopheader ? 'arrowdown' : 'arrowright');
                $curobj.hover(
				function (e) {
				    var $targetul = $(this).children("ul:eq(0)");
				    this._offsets = { left: $(this).offset().left, top: $(this).offset().top };
				    var menuleft = this.istopheader ? 0 : this._dimensions.w;
				    menuleft = (this._offsets.left + menuleft + this._dimensions.subulw > $(window).width()) ? (this.istopheader ? -this._dimensions.subulw + this._dimensions.w : -this._dimensions.w) : menuleft;
				    if ($targetul.queue().length <= 1) //if 1 or less queued animations
				        $targetul.css({ left: menuleft + "px", width: this._dimensions.subulw + 'px' }).slideDown(jqueryslidemenu.animateduration.over);
				},
				function (e) {
				    var $targetul = $(this).children("ul:eq(0)");
				    $targetul.slideUp(jqueryslidemenu.animateduration.out);
				}
			); //end hover
            }); //end $headers.each()
            $mainmenu.find("ul").css({ display: 'none', visibility: 'visible' });

            //循环遍历清除父节点内ul无li的节点
            var flag = true;
            while (flag) {
                flag = false;
                $.each($($mainmenu).find("li"), function (i, n) {
                    if ($(n).find("ul").length > 0 && $(n).find("ul > li").length == 0) {
                        flag = true;
                        $(n).remove();
                    }
                });
            }

        }); //end document.ready
    }
};
jqueryslidemenu.buildmenu("globalMenu");